The 2026 heatwave is a global phenomenon, inflicting extreme temperatures on billions of people from the United States to Europe and South Asia. Extreme heat is deadly. In Europe, an estimated 10,000 people have died from heat this summer, and the official count of a few dozen deaths in India and Pakistan is likely to be too low by several orders of magnitude, according to a recent scientific study. Dozens of Americans died from heat over the Fo…